Creating a lazy v-model binding for the value

My Vue component is a text editor from a 3rd party package, requiring a value to render correctly.

<SomeComponent v-model:value="text" />

<script setup>
const props = {
    records: {
        type: Object,
    },
}
const text = computed(() => props.records.first())
</script>

I need to update my database whenever the text property changes.

watch(text, () => {
    //Post to database...
})

To prevent database updates on every keystroke, I attempted to make the v-model lazy like this:

<SomeComponent v-model:value.lazy="text" />

Unfortunately, this method did not work, as the code inside my watch method is triggered with each keystroke.

Answer №1

  1. Using v-model="text" is sufficient; there's no need for v-model:value="text".

  2. If you prefer a lazy input without additional functionality, simply use v-model.lazy="text".

  3. Whether your input updates lazily or instantly, the watcher will monitor every change, even each keystroke in an input.


If you want to make it lazy and update the DB with every change, follow this code snippet:

<SomeComponent :value="text" @change="onChange">\

<script setup>
   const onChange = (event) => {
     text.value = event.target.value;
     // post to DB
   }
</script>

If the above method fails, the issue may lie with the third-party package. Check the package documentation for a potential prop that enables lazy text editing.

Answer №2

According to the official documentation, the v-model attribute is simply a shortcut for binding input values.

Essentially, these two code snippets achieve the same result:

<input v-model="text">

<input :value="text" @input="event => text = event.target.value">

If you need your component to update on the change event, you can use something like this:

<SomeComponent :value="text" @change="event => text = event.target.value" />

Alternatively, you could opt for this approach:

<SomeComponent v-model.lazy="text" /> <!-- where 'text' acts as both getter and setter -->

Referencing the documentation: https://vuejs.org/guide/essentials/forms.html#lazy


For a more advanced solution, consider implementing debouncing on your inputs (although it requires additional effort, it offers a more sophisticated way of managing state updates).

Answer №3

Due to restrictions in the 3rd party plugin, I had no choice but to utilize lodash's debounce method as a workaround for not being able to omit the v-model:value property:

<SomeComponent v-model:value.lazy="text" />
watch(text, _.debounce(function () {
    //Sending data to database...
}, 500));

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